Lebanese army explosives experts work on preparing the site to explode a walkie-talkie that they found thrown away a day after several devices exploded.Photo by Stringer/picture alliance via Getty ImagesPagers and walkie-talkies belonging to Hezbollah members blew up across Lebanon this week.The attacks, an apparent supply chain infiltration, have been attributed to Israel.Two former spies said the operation showed tactical mastery.Scores of pagers and walkie-talkies used by the Hezbollah militant group exploded across Lebanon this week, leaving dozens of people dead and thousands more injured and raising the potential for escalation between two bitter enemies.Emerging details from the sophisticated attack, in which the personal, handheld devices carried by militants were rigged with tiny explosives, reveals a textbook covert operation, former American and Israeli spies told Business Insider."We are looking at something that has been a very carefully, very thoroughly, well-calculated, meticulously tailored process," said Avi Melamed, a former Israeli intelligence official, who likened it to a "long-term chess game."The attacks appear to have blinded the militancy's communications but the strategic objectives of the coordinated blasts remain unclear, leading to questions about timing and intent.The chaos and carnage began on Tuesday when pagers used by Hezbollah members started beeping before they exploded en masse across Lebanon.